You said there is no spark. If you are sure about that, the solenoid is not implicated. The problem has to be in the ignition modules and their wiring. It is unlikely both modules would be defective (unless the previous owner put 12 Volts on the kill wire at some point, of course). I suggest looking at the kill wire circuit. Can you disconnect the individual wires at the Magnetron modules without performing surgery on the wires? If you can do that temporarily it eliminates those two diodes from the circuit, ensuring that the two modules are not connected to each other. Be quite certain that what you have is an ignition failure though - you can waste a lot of time if you start off with fundamentally wrong data on the problem.
